Add extra column to myfiles or documentlibrary doclist

How can add extra column to myfiles or documentlibrary doclist for docs with custom model type.

If doc have custom model type and property like my:CustNumber need to see it in added column named e.g. CustNumber in general view of myfiles or site documentlist. Or maybe view additional column only in folders with custom type. This like fiolders have automatic rule to assign new custom model properties so all docs in this folder have my:CustNumber 100%.